It's the latest outbreak of a disease that had been virtually eliminated in the U.S., and it comes as vaccination rates are declining — jeopardizing the country's herd immunity from widespread outbreaks.

Fifteen measles cases — mostly in school-aged children — have been confirmed in a small county in West Texas with one of the highest rates of vaccine exemptions in the state. Some of the cases appear to be connected to private religious schools in the district, said Holbrooks, who cautioned that the investigation is ongoing.

A measles outbreak is growing in a Texas county with dangerously low vaccination rates. In late January, two school-age children from Gaines County were hospitalized with measles. Since an estimated 1 in 5 people with the disease end up in the hospital, the two cases suggested a larger outbreak.

The Texas Department of State Health Services is reporting an outbreak of measles cases in Gaines County within the last two weeks. Eight of the 10 cases involved school-aged children.

An outbreak of measles in West Texas has been reported by the Texas Dept. of State Health Services. 10 cases have been identified and seven of those have been hospitalized. Eight of the cases are among school-aged children.

After two measles cases were identified in Houston; an outbreak has been reported in West Texas. Doctors say it's a concerning trend.

A measles outbreak is growing in a rural area of West Texas where vaccination rates are well below the recommended level.

West Texas faces a measles outbreak, with 10 unvaccinated people infected, mostly children. Health officials expect more cases and emphasize the importance of the MMR vaccine as vaccination rates fall and exemption requests rise in Texas.

On January 30, officials reported two measles cases in unvaccinated, school-age children in Gaines County, which sits at the border of New Mexico and is around 90 miles southwest of Lubbock, Texas. Both children were hospitalized in Lubbock and had been discharged.